AccuFlux combines the advantages of nozzle based downhole flow control with AccuRite™ wire wrap screen, a gap based sand control that requires sand sampling and analysis for accurate gap sizing. The flow control capability can be configured to the formation requirements at the wellsite prior to deployment.Download Brochure » Contact Us »
Flow control also aids in removing formation damage from drilling and completion fluids or operations. AccuFlux sand control is comprised of keystone shaped wire continuously wrapped and spot welded over perforated base pipe. The uniform gap size between each wire should be sized to the specific reservoir characteristics.
Well completion decisions must balance efficient sand control with optimum well productivity and cost concerns. Operators are recognizing that the intervals along laterals do not contribute production equally. They need effective ways to better manage the pressure profile from toe to heel in order to clean up drilling fluids and later to delay water influx. As well, sand entering the wellbore over time can reduce well productivity, damage surface facilities, or worse, cause expensive remediation and catastrophic well failure.
AccuFlux is a cost effective sand and flow control option suitable for more consolidated and homogeneous reservoirs with relatively uniform particle size distributions.
Why is Retained Permeability Important in Sand Control?
AccuFlux is best suited for relatively consolidated, uniform sands with larger particle sizes.
Unlike channel or tube-based ICDs, nozzles are relatively viscosity independent as shown below. The pressure drop is measured for various fluids passing through a standard 4.00 mm nozzle.
AccuFlux provides an effective inflow area that is 5 times greater than slotted pipe of the same gap size. Properly sized, AccuFlux screen stops sand from entering the wellbore. Fluid flows through the wire gaps, along the support grid to the nozzles which are viscosity independent flow control devices. A large flow area between the screen media and the base pipe prevents erosion and any undesirable pressure losses.
Wire wrap screen performance depends on larger grain sizes, representative sand samples, and accurate particle size distribution analysis for accurate gap sizing. With relatively large, uniform sands and proper gap sizing, stable arches (A) shown in the diagram below and bridges (B) will form across the gaps between wires and allow fluids to flow between the particles while stopping solids.
AccuFlux can be configured for either production or for steam or chemical injection at the wellsite prior to deploying the screen system. For injection, the port plugs are removed, threaded nozzles installed and plugs are reinstalled. Fluids are pumped into the wellbore and exit through nozzles that are strategically placed so thief zones are shut off and injected fluids have their intended impact. The AccuFlux flow path directs the fluid into the near wellbore area at the sand-screen interface for uniform injection of gas, water, or steam from toe-to-heel of the well.
Depending on the application, the screen sections are built using 90L, 90, 90H, 47 or 47H wrap and rib wire. Typical AccuFlux assemblies:
Unique applications are addressed with erosion- corrosion resistant metallurgies options for length and diameter of base pipe.
Many factors influence proper completion design. Absolute’s Technical Application Managers located around the world are available to assist completion teams with configuring sand control and flow control solutions to achieve optimal well performance through: